If you have questions, comments, and/or feedback regarding theTall Arrays in Action video, or using MATLAB with big data in general, please post them here, and I will respond to you (or find someone to respond =P) as soon as I can!
Best regards, Gabriel
P.S. Heather Gorr has a very similar video locatedhere. This Answers entry is intended for the first video, but feel free to ask away about tall arrays in general =)